Keystones — Lintel
Five GCSE retrieval questions · 20 December 2016 · mathsvault.uk/keystones
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1. Number Converting to standard form
Write 0.093 in standard form
Answer: 9.3 × 10-2 -
2. Algebra Factorising monic quadratics
Factorise: x² + 4x - 12
Answer: (x + 6)(x - 2) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 20cm, angle = 45°. Find adjacent side. Give your answer to 2 decimal places
Answer: 14.14cm -
4. Ratio Mixed ratio problems
In ratio 1:6:12, what fraction is the first part?
Answer: 1⁄19 -
5. Statistics Mean
Calculate the mean of: 24, 10, 14, 33, 6, 43, 31
Answer: 23